(112)-Oriented MAPbI₃ Single Crystals
Ultra-Sensitive Detection
Phenethylammonium cations induce high-index (112) facets, yielding markedly enhanced hole mobility and detection performance.
Rongxue, Zhou · Lai, Bo · Ying, Li · Ziyuan, Huang · Yixuan, Li · Xing, Jun · Huiying, Chen · Liu, Xinyue · Zang, Hang · Jiang, Ke · Yu, Weili · Sun, Xiaojuan · Li, Dabing
Materials Today Physics 2026
Specifications
- Hole mobility
- {'zh': '302', 'en': '302'} cm² V⁻¹ s⁻¹
- Responsivity
- {'zh': '228.7', 'en': '228.7'} A W⁻¹
- Specific detectivity
- {'zh': '6.8 × 10¹³', 'en': '6.8 × 10¹³'} Jones
Advantages
Dramatically enhanced hole mobility
The exposed high-index (112) facets enable efficient in-plane charge transport, giving a hole mobility as high as 302 cm2 V-1 s-1.
Nearly one order higher detectivity
The specific detectivity reaches 6.8×1013 Jones, nearly one order of magnitude higher than that of pure MAPbI3 SC photodetectors, significantly enhancing low-light detection.
High responsivity
Under 532 nm illumination, the photodetector exhibits a responsivity of 228.7 A W-1, meeting the demand for sensitive photoelectric conversion.
Applications
- Photodetectors：Provides high-mobility crystal wafers for direct fabrication of high-performance lateral photodetectors
- Perovskite optoelectronic devices：High-index facet engineering can be a general strategy to enhance charge transport in various perovskite optoelectronic devices
- High-sensitivity optical sensing：Enhanced detectivity by nearly one order enables sensitive acquisition of weak optical signals
- Low-light detection：High specific detectivity and responsivity enable effective operation under low illumination